A combination photo shows Microsoft Corp CEOs in its 39-year history – the founder of Microsoft Gates, then CEO Ballmer and Nadella, newly named chief executive officer of Microsoft Corp

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A combination photo shows Microsoft Corp CEOs in its 39-year history – the founder of Microsoft Bill Gates (L), in New York September 24, 2013, then CEO Steve Ballmer (C) in New York October 25, 2012 and Satya Nadella (R), newly named chief executive officer of Microsoft Corp in an undated Microsoft handout photograph released on February 4, 2014. Microsoft Corp named Nadella as its next chief executive officer on Tuesday, ending a longer-than-expected search for a new leader after Ballmer announced his intention to retire in August. REUTERS/Files (L and C)/Microsoft (R)/Handout via Reuters (UNITED STATES – Tags: BUSINESS HEADSHOT PROFILE SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY) ATTENTION EDITORS – THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE (R) WAS PROCESSED BY REUTERS TO ENHANCE QUALITY. AN UNPROCESSED VERSION WILL BE PROVIDED SEPARATELY. MANDATORY CREDIT